Odpowiedź:
[tex]a) \: 8x - 6 = 15 \\ 8x = 15 + 6 \\ 8x = 21 \\ x = \frac{21}{8} = 2 \frac{5}{8} \\ b) \: 41 - 3x = 30 \\ - 3x = 30 - 41 \\ - 3x = - 11 \\ x = \frac{ - 11}{ - 3} = 3 \frac{2}{3} \\ c) \: 25 + 2x = 40 \\ 2x = 40 - 25 \\ 2x = 15 \\ x = \frac{15}{2} = 7 \frac{1}{2} [/tex]
[tex]d) \: 8 = 2x + 10 \\ 2x = 8 - 10 \\ 2x = - 2 \\ x = - 2 \div 2 \\ x = - 1 \\ e) \: 40 + 5x = 12 \\ 5x = 12 - 40 \\ 5x = 28 \\ x = \frac{28}{5} = 5 \frac{3}{5} \\ f) \: 16 - x = 19 \\ - x = 19 - 16 \\ - x = 3 \\ x = - 3[/tex]
